JP2626322B2 - Cap for vacuum container and sealing method for vacuum container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap for a decompression container and a decompression container seal, which can seal a decompression container in which the pressure in the container is reduced by using the decompression in the container and can open and close with a small force. About the method.

[0002]

2. Description of the Related Art As conventional caps for vacuum containers, there are known many caps for sealing the inside of containers such as Japanese Patent Publication No. 1-59179, Japanese Utility Model Publication No. 45-27915, and Japanese Patent Application Laid-Open No. 57-22825. ing. In these known caps, for example, a convex cap top plate is fitted in the inside of the opening end of the container, and the cap top plate is spread using the vacuum in the container to obtain a pressing force for sealing inside the container. Also, the cap top plate, which is slightly wider than the diameter of the container opening end, is pressed in so that a seal can be obtained at normal pressure, and sealing is performed with a pressing force that tends to restore the cap top surface deformation. When the inside of the container is evacuated to a high vacuum, these caps have a stronger press-fitting force and have an effect of sealing. On the other hand, however, there is a disadvantage that a large torque is required when opening. On the other hand, if a cap of a flat top plate is used, the top surface is bent inward by vacuum, and the 45 ° tapered surface, which is the sealing surface of the cap, is strongly pressed against the opening end of the container. Since the top plate of the seal portion has no wall thickness and is easily drawn into the inner surface, the effect of lifting the top plate by the cap lift is small, and vacuum breakage is unlikely to occur. Therefore, there is a disadvantage that the opening torque is greatly increased in a state where the stopper is strongly pressed in a high vacuum.

[0003]

The above prior art is
In each case, the outer peripheral wall of the cap and the peripheral wall of the inner peripheral wall provided inside and the peripheral wall of the opening of the container are pressed and sealed to seal the inside. Due to such a structure, the container and the lid must always be tightly tightened so that the lid is slightly deformed by a mechanical force, for example, a screw structure in order to make the lid tightly sealed.
Once covered, the vacuum was difficult to break as described above, requiring a large force to close the lid, and a large torque to remove the lid. In other words, the sealing torque of the lid and the peripheral wall of the container are so large that the opening torque is inevitably increased considerably.

[0004] More specifically, when a conventional cap is to be opened in a state where the inside of the container is packed with a vacuum, the top surface of the cap fitted into the container must be pulled up to the upper part of the opening of the container. Cannot be destroyed. If breakage occurs, the cap is easily opened. In the meantime, however, the cap must be lifted against the force of pulling the cap into the container and the friction generated by the sealing portion being pressed against the inner wall of the opening end of the container. There are problems such as having to rotate many turns to get the lift amount of the cap that breaks the vacuum, tightening is too tight and it does not rotate, and it becomes a cap that does not immediately feel free to rotate even if rotated I have. In particular, the higher the degree of vacuum in the container and the greater the deformation of the top surface, the more the tendency. These disadvantages are caused by the basic means of sealing the container opening with a lid and the structure of the container opening and lid.

[0005]

SUMMARY OF THE INVENTION The present inventor has studied a cap for a decompression container that can be closed and opened with a small force, and opens and closes the lid with a small force by utilizing the reduced pressure of the container. Knew to get. That is, since the sealing of the decompression container is automatically performed when the sealing surface of the cap and the inner peripheral surface of the opening of the container abut, no other force or structure is required. This alone is sufficient. That is, it is important that the seal portion eliminates the action of external force more than necessary. These external forces make it difficult to open the container unnecessarily, which is inconvenient.
In order to utilize such reduced pressure, it is impossible with a cap having a conventional structure, and a special structure is required so that the structure of the fitting portion of the cap fitted to the opening of the container and the top plate of the cap can be sealed by reduced pressure. The present invention was completed by elucidating that the structure must be made as follows.

The present invention relates to “1. A convex or convex curved surface projecting outward in an arc shape.
A pyramid-shaped convex disc-shaped top plate (1), a cylindrical outer peripheral wall (2) hanging down and connected to the periphery of the top plate, and a ring-shaped outer wall surrounded by an inner peripheral side wall and a cylindrical outer peripheral wall. A fitting groove (4) fitted with the opening of the container is provided, and comprises a ring-shaped inner peripheral side wall (3) hanging downwardly arranged on the peripheral edge of the lower surface of the top plate, and a cylindrical outer peripheral wall. In the cap in which the fixing portion to be joined to the fixing portion provided on the side wall surface of the container is disposed on the inner peripheral surface of the container, the top and bottom of the top plate that protrudes in an arc at the position between the cylindrical outer peripheral wall and the inner peripheral side wall (A) a support portion for forming a top surface (7) of a fitting groove, which is in contact with an opening end surface of the container to restrain the top plate, and (B) an opening of the container. reduction, characterized in that the seal contact section consisting of upper inner peripheral surface and the sealing surface formed by the outer peripheral surface of the peripheral side wall abutting (5) is disposed Container cap. 2. 2. The pressure-reducing container cap according to claim 1, wherein the sealing surface of the inner peripheral side wall of the cap is a slope inclined toward the center of the cap. 3. The sealing surface of the cap has an outwardly convex arc shape;
Item 3. A pressure reducing container cap according to item 2 or 2. 4. The ring-shaped inner peripheral side wall was formed integrally with the top plate,
4. The cap for a decompression container according to any one of items 1 to 3. 5. 5. The cap for a decompression container according to any one of items 1 to 4, wherein the fixing portion provided on the inner peripheral surface of the cylindrical outer peripheral wall of the cap is a screw-shaped screw. 6. Any one of items 1 to 5, wherein a lower end of the inner peripheral wall of the cap projects below a surface extending from a lower surface of the top plate;
The cap for a decompression container described in the paragraph. 7. A disk-shaped top plate that protrudes outward in an arc shape (1)
And a downwardly extending cylindrical outer peripheral wall (2) connected to the periphery of the top plate, and a downwardly hanging ring-shaped inner peripheral side wall (3) installed at the periphery of the lower surface of the top plate. A fitting groove (4) that fits into the opening of the ring-shaped container surrounded by the side wall and the cylindrical outer peripheral wall is provided, and is provided on the inner peripheral surface of the cylindrical outer peripheral wall on the opening side wall surface of the container. A screw cap in which a fixing part to be joined to a fixing part is arranged, the position between the cylindrical outer peripheral wall and the inner peripheral side wall, and a position where the upper and lower surfaces of the arc-shaped overhanging top plate are respectively sandwiched between extended surfaces. (A) a support portion that forms the top surface (7) of the fitting groove and contacts the opening end surface of the container to restrain the top plate; and (B) a sealing surface formed by the outer peripheral surface of the inner peripheral side wall (5). The cap for the decompression container provided with the seal contact part consisting of
The cap is supported by covering the open end upper surface of the container with the open end upper surface (6) of the container in contact with the top surface of the ring-shaped fitting groove, and sealing the inner peripheral side wall with the open end of the container. The depressurization that is brought into contact with the peripheral edge, restrains the seal contact portion at the open end of the container, and suctions the support surface of the fitting groove and the contact seal surface of the inner peripheral side wall into the container by depressurizing the container to seal the container. Container sealing method. About.

[0007]

The first feature of the present invention is that the upper top plate of the cap is made convex outward. If the inside of the container is decompressed, the flat top plate is deformed convexly inward, and the friction between the cylindrical peripheral wall of the cap and the peripheral wall of the container is increased, resulting in a disadvantage that the opening torque is increased. The top plate of the cap may be convex in a curved arc shape or convex in a polygonal pyramid shape. A second feature of the present invention is that the seal contact portion and the support portion of the cap are located within the extension of the upper and lower surfaces of the top plate. Third of the present invention
Is characterized in that the outer peripheral surface of the inner peripheral side wall of the cap is formed as a slope inclined toward the center of the cap to form a contact seal surface. When the fitting groove of the cap is fitted into the container opening by the fitting groove being in the above-mentioned position, the contact seal surface of the cap comes into contact with the inner peripheral edge of the end of the container opening, and the pressure inside the container is reduced. The seal is made in close contact. Although the contact width of these two is narrow, since the arranged position is a special position arranged in a space extending the upper and lower top plate surfaces,
The depressing force applied to the top plate by the reduced pressure, in other words, the force pulling the cap into the container, acts vertically on the contact seal surface forming the inclined surface, and this force is divided vertically and horizontally on the inclined surface, The horizontal component force pushes the sealing surface toward the periphery of the cap and presses against the opening periphery of the container, while the vertical component force pushes the sealing surface downward and again against the opening edge of the container. Due to the action of these two components, sealing is performed very well, albeit with a narrow width. And there is no fastening by other means, the contact area is small and the friction is small, so that the plug can be opened with a small torque. Further, the support portion provided in the fitting groove of the cap for restraining the top plate prevents deformation of the top plate, and prevents an increase in frictional force between the inner peripheral wall of the cap and the peripheral wall of the container.

The above features will be described in detail. The reason why the seal contact part of the cap must be within the extension of the upper and lower top plate surfaces If the vacuum cap is sealed with a vacuum inside the container, it will be pulled into the container by the atmospheric pressure on the top surface of the cap And the power works. The cap is strongly pressed against the upper end of the container by the force of the vacuum. Therefore, a container opening end upper surface that supports a vertical force is required. Furthermore, by making the top surface of the cap into a dome shape, the deflection of the top surface deformed by vacuum is changed to horizontal displacement, and this is restrained by the inner surface of the container opening end, and the effect of pressing part of the cap is obtained. I have. Modeling this mechanism, the container opening end that contacts the cap is divided into a support surface and a sealing surface. The vacuum cap will be examined from the positional relationship between the extension of the top plate surface and the support and seal parts.

From the effect of the seal, the more the seal part is removed from the extension line, the more pressure is applied by bending deformation of the cap, so that the horizontal force cannot be used efficiently. Further, since the repulsive force due to the bending deformation of the material is mainly used for the seal, deterioration such as creep is likely to occur and the function of the seal is easily lost. b. Action of Rotational Moment at Support Point When the cap has an external thread on the cylindrical outer wall and there is an extension of the upper and lower surfaces of the top plate inside the support point, a torque is generated at the support portion by the force of the vacuum. This has the effect of raising the cylindrical outer peripheral wall, thereby tightening the threads. As a result, the opening torque is increased. c Ease of opening due to the difference in lift travel The details will be described in a comparative example. However, both the support part and the seal part are within the extension of the upper and lower surfaces of the top plate. Looking at the case where the support part is on the periphery of the cap and it is in the extension of the top and bottom surfaces of the top plate,
In the latter, when turning to open the cap,
A long lift is required to eliminate contact between the inner surface of the container and the cap seal. During this time, the cap must be moved against the friction between the atmospheric pressure and the inner surface of the container, so that the cap is difficult to open. In the former, decompression breaking occurs with a small amount of movement, and opening becomes easy. The wider the cap shape and the higher the degree of decompression, the more difficult it is to open in the latter form. In this way, by providing the seal portion of the cap at the periphery of the top plate which is sandwiched between the upper and lower surfaces of the top plate of the cap which are respectively extended, the inner peripheral wall of the cap is utilized by utilizing the reduced pressure in the container. Performing a seal by decompressing the top plate pressing force due to reduced pressure in the horizontal direction and the vertical direction on the sealing surface is a novel sealing method first clarified by the present inventors, and the opening and closing plug can be performed with a small force. effective. Then, when the inner peripheral edge of the opening of the container is made to be in contact with the inner peripheral wall sealing surface of the cap with an inclined surface, the sealing becomes better, but the contact width is narrow, so that the friction does not increase and opening is easy. The sealing surface of the cap may be arc-shaped instead of inclined. Also in this case, the force is divided in the horizontal direction and the vertical direction at the contact portion with the peripheral edge of the opening of the container, and the same sealing effect is achieved.

[0010] The cap of the present invention can be sufficiently sealed only by covering the opening of the container. However, an appropriate screw is provided on the inner surface of the cylindrical outer peripheral wall of the cap to engage with the screw on the outer periphery of the container. You may. This arrangement allows the cap to be lifted easily, rather than tightening the cap to the container, and is used to reopen the container once it has been opened and depressurized. This fixation also has the effect of preventing breakage of the seal due to impact during handling. This is because, when the reduced pressure is removed, the plugging using the reduced pressure, which is a feature of the present invention, cannot be performed. The inner peripheral wall of the cap of the present invention may be formed integrally with the cap, or a ring-shaped peripheral wall having a triangular or semi-circular cross section may be separately molded and arranged. The cap of the present invention may be made of a synthetic resin or metal, but when it is made of a hard material, it is preferable to dispose an inner peripheral wall separately made of a synthetic resin. The contact seal surface of the inner peripheral wall of this cap is not packing, but the top plate of the cap is drawn into the container by depressurization and tightly seals with the peripheral edge of the container opening, so that it is in close contact with the peripheral edge of the container opening by depressurization Is enough. Again, the sealing of the present invention is not performed by surface contact between the peripheral wall of the container and the peripheral wall of the cap. To the last, sealing is performed by contact between the top surface of the fitting groove provided at a specific position of the cap due to pressure reduction and the upper surface of the container opening end, and the contact sealing surface of the cap inner peripheral wall and the narrow width contact of the container opening peripheral edge. ,
These contacts are not planar contacts, but rather linear contacts. In the cap of the present invention, the deformation of the cap top surface due to the vacuum is restrained by the opening end of the container to prevent deformation, so that the friction between the cap and the peripheral wall of the container is small, and the cap can be lifted while maintaining its shape when rotated. Therefore, the contact of the seal part is easily broken and the vacuum break occurs immediately,
It becomes a vacuum cap that is easy to open with a sense of release immediately. On the other hand, with a cap like a flat plate, the top surface is drawn into the container and bends and deforms, so even if you lift the cap that has been deformed in this way, the contact of the seal part is hard to cut off and it can not be easily released . A cap that rotates but does not open.

[0011]

EXAMPLES Next, the present invention will be specifically described based on Examples, and a comparative test with a conventional cap will be shown. FIG. 1 shows an embodiment of the present invention, and shows a cross-sectional front view of a container covered with a cap. FIG. 2 is an enlarged view showing a sealed state of the cap and the upper end of the opening of the container in FIG. As is clear from FIGS. 1 and 2, the top plate 1 of the cap is convex upward.
Reference numeral 2 denotes a cylindrical outer wall that hangs down and is connected to the periphery of the top plate, and has a fixed projection 9 that is joined to a fixed portion on the outer periphery of the container on the inner peripheral side. The container may be fixed in a screw shape, or may be fixed simply by combining the upper and lower surfaces of the projections. Reference numeral 3 denotes a ring-shaped inner peripheral wall which is provided on the lower peripheral edge of the top plate and hangs downward. A fitting groove 4 is formed between the inner peripheral wall and the outer wall so as to be fitted to the upper end of the opening of the container. I have. Reference numeral 7 denotes a top surface of the fitting groove, which is in contact with the upper end 6 of the opening of the container when the cap is covered, and forms a support portion for restraining and supporting the top plate of the cap with both. Reference numeral 5 denotes an outer peripheral surface of the inner peripheral wall, which is a slope inclined obliquely downward and forms a sealing surface. Reference numeral 8 denotes an inner peripheral surface of the upper end of the container opening, which is a slope inclined inward of the container. A seal contact portion is formed by the cap seal surface 5 and the inner peripheral surface 8 of the upper end of the opening of the container. When the cap is covered on the container, the upper end of the opening of the container is inserted into the fitting groove, and the upper end surface 6 of the opening comes into contact with the top surface 7 of the fitting groove of the cap to restrain and support the top plate of the cap. The sealing surface 5 of the inner peripheral wall 3 of the cap is in contact with the inner peripheral surface 8 at the upper end of the opening of the container. The container is thus sealed with the support and the sealing surface 5. Since the inside of the container is under reduced pressure, the suction force acts on the top plate. The upwardly convex top plate is pushed downward and spreads in the lateral direction, so that a so-called toggle effect is exerted, and the sealing surface 5 is pressed against the inner peripheral surface 8 at the upper end of the opening to seal. On the other hand, the upper end surface 6 of the container opening and the top surface 7 of the fitting groove are in contact with each other, but this portion serves to support the top plate rather than the seal, and restrains the top plate to prevent unnecessary deformation.

With this structure, the sealing is performed only with a narrow width between the sealing surface of the cap and the inner peripheral surface of the upper end of the opening of the container, and furthermore, the support portion prevents unnecessary deformation of the top plate.
The deformation prevents the friction of the seal contact portion from increasing and reduces the force for breaking the seal, the so-called opening force. That is, since the deformation of the top plate is small, the friction of the support portion when opening is small, and the friction of the seal portion is also small, so that the cap can be raised with a small torque. If the seal contact part is separated, the vacuum is broken, and opening becomes easy. As understood from this embodiment, the support portion that restrains the top plate and prevents unnecessary deformation of the top plate, and the support portion that the seal contact portion is not on an extension of both the upper and lower surfaces of the top plate. Since the restraint of the top plate is weakened and the deformation of the top plate is increased, the opening torque is not reduced. The upper portion 10 of the fitting groove at the outer peripheral edge of the top plate increases the binding force of the top plate,
It is preferable to make the top plate thick to prevent unnecessary deformation of the top plate.

FIG. 3 shows another embodiment. In this embodiment, the lower end of the ring-shaped inner peripheral side wall of the cap extends below the extension of the upper and lower surfaces of the top plate. Even with such an inner peripheral side wall, if the seal contact portion and the support portion are within the extension line of the upper and lower surfaces of the top plate, unnecessary deformation of the top plate is prevented by the support portion, and the sealing is completely performed. In addition, the opening torque can be reduced.

FIG. 4 shows another embodiment, in which the sealing surface 5 of the inner peripheral wall of the cap is an arc-shaped curved surface. This sealing surface has a narrow width and is almost linear and comes into contact with the inner peripheral surface of the upper end of the opening of the container, so that there is an advantage that the opening force is smaller.

FIG. 5 shows a comparative example in which the top plate is flattened.
The top plate is pushed into the container and is greatly deformed downwardly concave, the cylindrical outer wall is opened outward, and the upper end 6 of the opening of the container does not support the top surface 7 of the cap. The contact is pressed very strongly and the seal is not broken.
Therefore, the opening torque is very large and opening is difficult.

FIG. 6 shows another comparative example in which the support portion of the cap and the contact seal surface are not in the surface extending from the upper and lower surfaces of the top plate, but are located on the center side of the cap from the surface. With such a structure, even if the top plate is formed into an outwardly convex arc shape, the top plate is pushed into the container and greatly deformed into a concave downward, the cylindrical outer wall is opened outward, and the opening upper end 6 of the container is opened. Does not support the top surface 7 of the cap, so that no support portion is formed, the seal contact portion is pressed very strongly, and the seal is not broken. Therefore,
The opening torque is very large and opening is difficult.

Next, comparative tests and their results will be described to explain the effects of the present invention. Comparative Test 1 Opening Torque Test The caps used were as shown in FIG. 2 for Example 1 and FIG.
Comparative Example 1 is the cap of FIG. 5 and Comparative Example 2 is the cap of FIG. 6, which is a screw cap formed of a polypropylene resin having a screw provided on the inner peripheral surface of the outer wall of the cap. On the other hand, the container is a stainless steel bottle having an inner diameter of 59 mm and a screw bottle provided with a screw around the upper end of the opening. The surface forming the contact seal portion on the inner periphery of the open end of the container is a slope having a width of 1.1 mm, and the surface supporting the cap has a width of 0.7 mm. Table 1 shows the resin areal weight of the cap and the thickness of the top plate.

[0018]

[Table 1]

In the test, capping was performed at an opening torque of 40 [kgf · cm], and opening torque was measured by hand.
Table 2 shows the test results.

[0020]

[Table 2]

[Note] The opening torque was represented by (Kgf · cm). From this test result, it is understood that the cap of the present invention can be opened with a small force. And it is clear that a large force is required for opening when the top plate is flat. Further, it is understood that even if the top plate is protruded in an arc shape, the opening torque is increased if there is no supporting portion for restraining and supporting the top plate at the opening of the container. Comparative test 2 Top plate deflection test Test method: The deflection at the center of the cap is measured. Table 3 shows the results.

[0022]

[Table 3]

[Note] The amount of deflection is shown in (mm). From this test, it can be seen that when the top plate is a flat plate, the deflection increases and the top plate is deformed. In addition, it can be seen that the top plate is largely bent if the cap has no supporting portion even when the top plate is convex outward. Then, it is understood that when the top plate is bent, the contact force of the contact seal portion is increased and the friction is increased, so that a large force is required for opening.

[0024]

According to the present invention, the cap can be easily opened by arranging the contact seal portion and the support portion of the cap between the extension lines of the upper and lower surfaces of the top plate.

[0025]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a covered state of a cap according to the present invention.

FIG. 2 is a partial cross-sectional view of the cap of the present invention.

FIG. 3 is a partial cross-sectional view of the cap of the present invention.

FIG. 4 is a partial cross-sectional view of the cap of the present invention.

FIG. 5 is a partial cross-sectional view of a cap of a comparative example.

FIG. 6 is a partial cross-sectional view of a cap of a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Top plate 2 ... Cylindrical outer wall 3 ... Inner peripheral wall 4 ... Fitting groove 5 ... Seal surface 6 ... Opening upper end surface 7 ... Top surface 8 ... Opening upper end inner periphery 9 ... Fixed protrusion 10 ... Upper part

Claims (7)

(57) [Claims] A curved convex shape that protrudes outward in an arc shape.
A ring surrounded by a cylindrical top plate (1) having a convex shape of a polygonal pyramid, a cylindrical outer peripheral wall (2) hanging downward connected to the periphery of the top plate, an inner peripheral side wall, and a cylindrical outer peripheral wall. A fitting groove (4) that fits into the opening of the container in the shape of a circle, and has a ring-shaped inner peripheral side wall (3) that hangs down and is disposed on the peripheral edge of the lower surface of the top plate, and has a cylindrical shape. In a cap in which a fixing part to be joined to a fixing part provided on a side wall surface of an opening is arranged on an inner peripheral surface of an outer peripheral wall, a top plate protruding in an arc shape at a position between the cylindrical outer peripheral wall and the inner peripheral side wall. (A) a support portion for forming a top surface (7) of a fitting groove, abutting against an opening end surface of the container to restrain the top plate, and (B) a container. and characterized in that the inner sealing surface formed by the outer peripheral surface of the peripheral side wall made of (5) Zeal abutting portion abutting on the inner peripheral surface open top end is disposed of Vacuum container cap that. 2. The pressure reducing container cap according to claim 1, wherein the sealing surface of the inner peripheral side wall of the cap is a slope inclined toward the center of the cap. 3. The cap for a decompression container according to claim 1, wherein the sealing surface of the cap has an arc shape convex outward. 4. The decompression container cap according to claim 1, wherein the ring-shaped inner peripheral side wall is formed integrally with the top plate. 5. The cap for a decompression container according to claim 1, wherein the fixing portion provided on the inner peripheral surface of the cylindrical outer peripheral wall of the cap is a screw-shaped screw. 6. The cap for a decompression container according to claim 1, wherein a lower end of an inner peripheral wall of the cap projects below a surface extending from a lower surface of the top plate. 7. A disk-shaped top plate (1) protruding outwardly in an arc shape, a cylindrical outer peripheral wall (2) hanging downward connected to a periphery of the top plate, and a lower surface of the lower surface of the top plate. A fitting groove (4), which comprises a ring-shaped inner peripheral side wall (3) hanging down at the peripheral portion and which fits into an opening of a ring-shaped container surrounded by the inner peripheral side wall and the cylindrical outer peripheral wall. A screw cap having a fixing portion to be joined to a fixing portion provided on the side wall surface of the opening portion of the container on the inner peripheral surface of the cylindrical outer peripheral wall, wherein the fixing portion is provided between the cylindrical outer peripheral wall and the inner peripheral side wall. (A) A top surface (7) of a fitting groove is formed at a position where the upper and lower surfaces of the top plate protruding in an arc are sandwiched between the extended surfaces, and the top plate comes into contact with the opening end surface of the container. For a pressure reducing container, which is provided with a support portion for restraining the seal and (B) a seal contact portion formed of a seal surface (5) formed on the outer peripheral surface of the inner peripheral side wall. Cap
The cap is supported by covering the open end upper surface of the container with the open end upper surface (6) of the container in contact with the top surface of the ring-shaped fitting groove, and sealing the inner peripheral side wall with the open end of the container. The depressurization that is brought into contact with the peripheral edge, restrains the seal contact portion at the open end of the container, and suctions the support surface of the fitting groove and the contact seal surface of the inner peripheral side wall into the container by depressurizing the container to seal the container. Container sealing method.